这座城市的经济适用房严重短缺。

There is a serious ___shortage of affordable housing in the city.

长期的干旱已导致该地区严重缺水。

The prolonged drought has caused severe water ___shortages in the region.

护理人员的短缺意味着现有员工的工作时间更长。

A ___shortage of nursing staff means longer working hours for existing employees.